Stripe order and magnetic anisotropy in the \(S=1\) antiferromagnet BaMoP\(_2\)O\(_8\)

Magnetic behavior of BaMoP\(_2\)O\(_8\) with the spatially anisotropic triangular arrangement of the \(S=1\) Mo\(^{4+}\) ions is explored using thermodynamic measurements, neutron diffraction, and density-functional band-structure calculations. A broad maximum in the magnetic susceptibility around 4...

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Bibliographic Details
Published in:arXiv.org 2018-09
Main Authors: Hembacher, Jan, Badrtdinov, Danis I, Ding, Lei, Sobczak, Zuzanna, Ritter, Clemens, Mazurenko, Vladimir V, Tsirlin, Alexander A
Format: Article
Language:English
Subjects:
Antiferromagnetism
Couplings
Magnetic anisotropy
Magnetic permeability
Magnetic properties
Neutron diffraction
Neutrons
Quantum phenomena
Spin-orbit interactions
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Summary:Magnetic behavior of BaMoP\(_2\)O\(_8\) with the spatially anisotropic triangular arrangement of the \(S=1\) Mo\(^{4+}\) ions is explored using thermodynamic measurements, neutron diffraction, and density-functional band-structure calculations. A broad maximum in the magnetic susceptibility around 46\,K is followed by the stripe antiferromagnetic order with the propagation vector \({\mathbf k}=(\frac{1}{2},\frac{1}{2},\frac{1}{2})\) formed below \(T_N\simeq 21\) K. This stripe phase is triggered by a pronounced one-dimensionality of the spin lattice, where one of the in-plane couplings, \(J_2\simeq 4.6\) meV, is much stronger than its \(J_1\simeq 0.4\) meV counterpart, and stabilized by the weak easy-axis anisotropy. The ordered moment of 1.42(9) \(\mu_B\) at 1.5 K is significantly lower than the spin-only moment of 2 \(\mu_B\) due to a combined effect of quantum fluctuations and spin-orbit coupling.
ISSN:2331-8422
DOI:10.48550/arxiv.1806.09314